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Titolo:
Effects of water salinity on acid-base balance in decapod crustaceans
Autore:
Whiteley, NM; Scott, JL; Breeze, SJ; McCann, L;
Indirizzi:
Univ Wales, Sch Biol Sci, Bangor LL57 2UW, Gwynedd, Wales Univ Wales Bangor Gwynedd Wales LL57 2UW Bangor LL57 2UW, Gwynedd, Wales
Titolo Testata:
JOURNAL OF EXPERIMENTAL BIOLOGY
fascicolo: 5, volume: 204, anno: 2001,
pagine: 1003 - 1011
SICI:
0022-0949(200103)204:5<1003:EOWSOA>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARCINUS-MAENAS-L; SHORE CRAB; CALLINECTES-SAPIDUS; CYTOPLASMIC ACIDIFICATION; ERIOCHEIR-SINENSIS; AQUATIC ANIMALS; NA+/H+ EXCHANGE; GILL EPITHELIUM; CARBON-DIOXIDE; ION-TRANSPORT;
Keywords:
acid-base balance; ion regulation; osmoregulation; crustacean; Eriocheir sinensis; Necora puber; salinity change;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Whiteley, NM Univ Wales, Sch Biol Sci, Bangor LL57 2UW, Gwynedd, Wales Univ Wales Bangor Gwynedd Wales LL57 2UW 2UW, Gwynedd, Wales
Citazione:
N.M. Whiteley et al., "Effects of water salinity on acid-base balance in decapod crustaceans", J EXP BIOL, 204(5), 2001, pp. 1003-1011

Abstract

Extracellular acid-base balance in decapod crustaceans is influenced by water salinity, although the nature of this relationship is unclear. In euryhaline crabs, a decrease in salinity results in a metabolic alkalosis in thehaemolymph and an increase in salinity results in a metabolic acidosis. Alterations in acid-base status by external changes in salinity are thought to be secondary to the adjustments required for ionic and osmotic regulation. In the present study, acid-base adjustments in the haemolymph of Eriocheir sinensis after transfer to 30% sea water accompanied alterations in muscle pH and [HCO3-], as an initial acidosis coincided with an alkalosis in theleg muscle. By 48 h transfer, haemolymph pH increased as muscle pH and HCO3- declined. Haemolymph [Cl-] decrease significantly 3 h after transfer to a new steady state but haemolymph [Na+] and muscle [Na+] and [Cl-] remainedunchanged. Muscle free amino acid concentration increased twofold 6 h after transfer, followed by a 2.5-fold increase in the haemolymph after 24 h, In contrast, 30% sea water had no effect on haemolymph acid-base adjustmentsin the osmoconforming crab, Necora puber, which lacks ion and osmo-regulatory mechansims, Collectively these observations support the view that salinity-induced alterations in acid-base status are caused by adjustments consistent with cell volume regulation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 21:41:31